968 The Progress of Arachnology in America, 
spiders, from that region; many interesting notes of habits z 
nests are also given. A few other short papers will be referre 
to in the classified list of literature given below. 
The above descriptive and systematic works describe from the 
region north of Mexico nine hundred and thirty-five species in- 
cluded in one hundred and thirty-seven genera. (This, of course, 
excludes those species which have been already reduced to syno- | 
nymes.) They are distributed in families as follows: 
Genera. Species. . 
THERIDIDA 44 268 s 
EPEIRIDÆ 16 172 A 
THOMISIDÆ 14 07 s 
ATTIDZ 12 156 y 
YCOSIDÆ 9 119 a 
JRASSID 9 55 ; 
GALIDÆ I2 23 f 
J RASSID 4 7 
YYSDERIDA 3 5 : 
JICTYNIDA 2 6 
AGALENID 2 3 
ULOBORIDZ wwe 2 3 4 
PHOLCIDA 2 2 j 
ScYTODIDA ji I $ | 
SER Oy Sa leg SAS d 
Of ‘ain ee Ha T ; 
r S 
EO ATA A T RAEI AEE ARA PE E N 137 935 i 
i 
Of course, the above numbers may be somewhat reduced, r 
a study of Southern forms will cause an identification y 
Walckenaer’s species with those of Hentz, with > : 
. harvest of synonymes. k re 
So far as is known to us, only five persons are actively ee 
Professor Atkinson is at work on the Mygalide; the will | 
are studying the Attidz; and Dr. Marx, of Wa 4 
soon give us a revision of the scorpions. In Ears | 
Keyserling is continuing his researches, and will doubtless 1 
f a | 
* If we add to these the two other principal groups of Arachnida as already k 
logued, we have: y Species- — 
Families. Genera. 935 
ÅRANEÆ sen ee 137 wo 
A w T oo 
ACARINA hisses T ‘uae 
otals 193 ny 4 
ane 
* Since the above was written, we learn that Dr. , ? 
press an extensive work on the spinning habits of American spiders. 
